N-21/2=-4n

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Solution for N-21/2=-4n equation: 



-21/2=-4N

We move all terms to the left:

-21/2-(-4N)=0

We get rid of parentheses

4N-21/2=0

We multiply all the terms by the denominator


4N*2-21=0

Wy multiply elements

8N-21=0

We move all terms containing N to the left, all other terms to the right

8N=21

N=21/8

N=2+5/8

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